/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.pigpen.editor.editparts;

import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.tools.CellEditorLocator;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Text;

/**
 * A CellEditorLocator for a specified label
 * 
 * Adapted from code by Phil Zoio at
 * http://www.eclipse.org/articles/Article-GEF-editor/gef-schema-editor.html
 */
public class LabelCellEditorLocator implements CellEditorLocator {

    private Label label;

    /**
     * Creates a new CellEditorLocator for the given Label
     * 
     * @param label
     *            the Label
     */
    public LabelCellEditorLocator(Label label) {
        setLabel(label);
    }

    /**
     * expands the size of the control by 1 pixel in each direction
     */
    public void relocate(CellEditor celleditor) {
        Text text = (Text) celleditor.getControl();

        Point pref = text.computeSize(SWT.DEFAULT, SWT.DEFAULT);
        Rectangle rect = label.getTextBounds().getCopy();
        label.translateToAbsolute(rect);
        if (text.getCharCount() > 1)
            text.setBounds(rect.x - 1, rect.y - 1, pref.x + 1, pref.y + 1);
        else
            text.setBounds(rect.x - 1, rect.y - 1, pref.y + 1, pref.y + 1);

    }

    /**
     * Returns the Label figure.
     * 
     * @return the Label
     */
    protected Label getLabel() {
        return label;
    }

    /**
     * Sets the label.
     * 
     * @param label
     *            The label to set
     */

    protected void setLabel(Label label) {
        this.label = label;
    }

}